Fabric color fastness testing method

Generally, when evaluating color fastness, it is pided into 3-4 levels. So, how to determine the level of color fastness will be based on the following standards. One of the standards is sun fastness, which is also the most common way to test color fastness. In the judgment process, it is pided into 8 levels, with level 1 being the worst and level 8 being the best. The method is to randomly select a sample cloth from the surface material of the piece, Divided into placing them under sunlight, after 8 hours of exposure, specialized instruments will be used to detect their respective fading conditions

From the perspective of soaping fastness

Of course, the method for testing fabric color fastness can also be judged by soaping in addition to sun exposure. Before cleaning, a piece of white cloth is sewn on the sample cloth separately, which can more clearly show the changes in washing fastness. Then, it is placed in the washing machine and washed according to normal operation. This method is the fastest detection method, In the judgment process, it is pided into 5 levels, with level 1 indicating severe fading and level 5 indicating no fading. Generally, if you want to quickly conduct color fastness testing, you will choose this method, which is much faster and more convenient than the sun exposure method

Color Fastness to Washing/Dry Cleaning

Test fabric samples under certain washing conditions (temperature, alkalinity, friction, etc.), and finally grade the samples with a gray card. The color comparison results show that samples with emerald blue, bright red, and navy blue have poor color fastness to washing. The testing principle for dry cleaning and washing is the same

Color Fastness to Rubbing

refers to placing fabric test samples on a friction tester for testing, including dry/wet friction testing. After the experiment is completed, a gray card can be used for color comparison rating.

Color Fastness to Sweat/Water Stains

The testing method for color fastness to water washing is similar, except that the sample is tested under sweat or water stain conditions, and the results are then matched with the sweat stain solution.

Color fastness test range

Polyester, knitted underwear, leather, nylon, nylon, jeans, silk, cotton, towels, zippers, acrylic, canvas, etc

Color Fastness Test Items

1. Washing Color Fastness

2. Rubbing/Cracking Color Fastness

3. Perspiration Color Fastness

4. Light&Sweat Composite Color Fastness; Perspiration

5. Dry cleaning

6. Light

7. Water

8. Bleaching

9. Sea water

10. Hot pressing

11. Dry heat

11. Acid spotting

12 Alkaline spotting

13 Water spotting

12. Chlorine Bleaching

13. Non chlorine Bleaching

14. Saliva

17. Contaminates

15 Color Fastness to Light and Sweat

Color Fastness Testing and Detection Standards

GB/T 250-2008 Textiles - Color Fastness Testing - Evaluation of Discoloration - Grey Sample Card

GB/T 251-2008 Textiles - Color Fastness Testing - Evaluation of Staining - Grey Sample Card

GB/T 420-2009 Textiles - Color Fastness Testing - Pigment Dyed Textiles - Color Fastness to Brushing

GB/T 730-2008 Textiles - Color Fastness Testing - Blue Wool Standard (1-7) Quality control of grade

GB/T 3920-2008 Textiles - Tests for Color Fastness to Rubbing

GB/T 3921-2008 Textiles - Tests for Color Fastness to Soap

GB/T 3922-2013 Textiles - Tests for Color Fastness to Sweat

Color Fastness to Washing

AATCC 61, GB/T 3921, GB/T 12490, ISO 105 C10, ISO 105 C06

Color Fastness to Water

ISO 105 E01, AATCC 107

GB/T 5713

Color Fastness to Dry Cleaning

AATCC 132, ISO 105 D01, GB/T 5711

Color Fastness to Sweat

AATCC 15, ISO 105 E04, GB/T 3922

Color Fastness to Rubbing

GB/T 3920, ISO 105-X12, AATCC 8

Color Fastness to Light

ISO 105 B02, ISO 105-B06, AATCC 16, GB/T 8427

Color Fastness to Light Sweat

GB/T 14576, ISO 105-B07 AATCC 125

Color Fastness to Saliva

GB/T 18886

Color Fastness to Seawater

ISO 105 E02, AATCC 106, GB/T 5714

Color Fastness to Heat Compression

Color Fastness to Chlorine Bleaching

ISO 105 N01, AATCC 188, GB/T 7069

Color Fastness to Non Chlorine Bleaching

AATCC 172

Color fastness to water

GB/T 8433, ISO 105-E03 AATCC 162

Color Fastness to Dry Heat

AATCC 117, ISO 105 P01

GB18401/GB31701 Color Fastness Index Requirements

The basic safety technical requirements for textile products are pided into Class A, Class B, and Class C according to the degree of index requirements

1 GB18401 Color Fastness Index Requirements

Items

Class A

Class B

Class C

Color Fastness ≥

Water Resistance (Discoloration, Staining)

3-4

3

Acid Resistance (Discoloration, Staining)

3-4

3

3

Alkali Resistance (Discoloration, Staining)

3-4

3

3

Dry friction resistance

4

3

3

Saliva resistance (discoloration, staining)

4

-

-

Non final products, natural colors, and bleached products that require washing and fading processes are not required Traditional hand dyed products such as tie dyeing and wax dyeing are not required

The color fastness to saliva is only evaluated for infant and young children's textile products

2. GB31701 Color Fastness Index Requirements

Item

Class A

Class B

Class C

Color Fastness to Wet Rubbing &Nbsp; ≥

3 (dark 2-3)

2-3

-

-

Natural and bleached products are not required According to GB/T 4841.3, colors greater than 1/12 of the dye dyeing standard depth card are considered dark colors; The above article is a partial list. For more testing needs and details, please consult the online consultant of the free consulting agency: 15201733840 (phone and WeChat). We conduct testing on the top 100 inspection websites - issuing authoritative testing reports has legal effect

Function of testing report:

1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report

2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms

3. Used as a sales report: issuing legally effective testing reports to make consumers more confident

4. Papers and research: Provide professional personalized testing needs

5. Judicial services: providing scientific, fair, and accurate testing data

6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problems

100% inspection and testing process:

1. Telephone communication and confirmation of requirements

2. Recommend solutions and confirm quotations

3. Mail samples and arrange testing

4. Progress tracking and result feedback

5. Provide reports and after-sales service

6. If urgent or priority processing is required

Testing and testing characteristics:

1. The testing industry is fully covered, meeting different testing needs

2. Fully cover the laboratory and allocate localized testing nearby

3. Engineers provide one-on-one services to make testing more accurate

4. Free initial testing, with no testing fees charged

5. Self service order delivery for free on-site sampling

6. Short cycle, low cost, and attentive service

7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc

8. The testing report is authoritative and effective, and is generally used in China